Subversion Repositories c0or1k

/*

 * Physical memory descriptors

 *

 * Copyright (C) 2007 - 2009 Bahadir Balban

 */

#ifndef __PAGER_PHYSMEM_H__

#define __PAGER_PHYSMEM_H__

/* A compact memory descriptor to determine used/unused pages in the system */

struct page_bitmap {

        unsigned long pfn_start;

        unsigned long pfn_end;

        unsigned int map[];

};

/* Describes a portion of physical memory. */

struct memdesc {

        unsigned int start;

        unsigned int end;

        unsigned int free_cur;

        unsigned int free_end;

        unsigned int numpages;

};

struct membank {

        unsigned long start;

        unsigned long end;

        unsigned long free;

        struct page *page_array;

};

extern struct membank membank[];

/* Describes bitmap of used/unused state for all physical pages */

extern struct memdesc physmem;

/* Sets the global page map as used/unused. Aligns input when needed. */

int set_page_map(struct page_bitmap *pmap, unsigned long start,

                 int numpages, int val);

void init_physmem_primary();

void init_physmem_secondary(struct membank *membank);

#endif /* __PAGER_PHYSMEM_H__ */